* {
    margin: 0;
    padding: 0;
    background: #669;

}

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

#clock {
    position: relative;
    width: 100%;
    height: 100%;
}

.label {
    display: inline-block;
    text-align: center;
    padding: 5px 5px;
    font-size: 20px;
    font-family: 楷体;
    transition: left 1s, top 1s;
    transform-origin: 0 0;
}